[Solved] Examine the following Spring Boot repository class: @Repository public interface ProductRepository { void addProduct(Product product); } What is the issue with this code? | Spring Boot

Spring Boot - Spring Annotations

Examine the following Spring Boot repository class:

@Repository
public interface ProductRepository {
    void addProduct(Product product);
}

What is the issue with this code?

AThe @Repository annotation cannot be used on interfaces

BInterfaces annotated with @Repository must extend a Spring Data interface like JpaRepository

CThe method addProduct must have a return type

DThe class should be annotated with @Service instead

Step-by-Step Solution

Solution:

Step 1: Understand @Repository usage
The @Repository annotation is typically used on classes or interfaces that interact with the database.
Step 2: Check interface requirements
When using Spring Data JPA, repository interfaces should extend JpaRepository or a similar interface to inherit CRUD methods.
Step 3: Analyze the given code
The interface ProductRepository does not extend any Spring Data interface, so Spring cannot provide implementation automatically.
Final Answer:
Interfaces annotated with @Repository must extend a Spring Data interface like JpaRepository -> Option B
Quick Check:
Interface repositories need to extend JpaRepository [OK]

Quick Trick: Repository interfaces must extend JpaRepository or similar [OK]

Common Mistakes:

Assuming @Repository can be used on any interface without extending JpaRepository
Thinking @Repository is only for classes
Believing method return types are mandatory for repository methods

Master "Spring Annotations" in Spring Boot

9 interactive learning modes - each teaches the same concept differently

More Spring Boot Quizzes

Examine the following Spring Boot repository class: